Malicious PDF — malware analysis report

Static analysis result for SHA-256 f16fadb3a825dc4d…

MALICIOUS

PDF

72.4 KB Created: 2021-05-24 00:53:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 60bd65ac3696ce7abc67b9f7a751d9ac SHA-1: 99011a7497d8f9e3e4df3a2b6c2984ea17652af0 SHA-256: f16fadb3a825dc4d02bb8ad16151fa05e2ede580304330b29e15e336efb5747e
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://xajibur.ru/strik?utm_term=7th+to+8th+grade+summer+math+packet+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387033/normal_6064cd85c11ae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403406/normal_5fc8dd1453177.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495395/normal_60160ae6952eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383698/normal_60093823752bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381973/normal_600cf58aa7c58.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502436/normal_5fffb5531859e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474759/normal_60527a52570f3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456377/normal_600125eb281f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422133/normal_600f7ed66ac52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484995/normal_60148f4d131c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379982/normal_6068a973562d3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/ratixifo/tamil_astrology_birth_chart_software_free.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/how_to_prepare_to_start_your_own_business.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/is_the_sun_a_cool_medium_or_hot_star_based_on_the_balmer_thermometer.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/82744831212.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/35001729417.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/bullworker_steel_bow_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jizubisetebof/audacity_1.3_free_download_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/sidofiwixoverudapevuv.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/c_primer_plus_5th_edition_solutions.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/93010808408.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/37875076688.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/how_to_medical_records.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d04f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD04F 5508 bytes
SHA-256: aeea0017e992b6044a6bee5e3ffbda32f2d23d5cd7c63654264707b727651d51
font_01_sfnt_off0000e312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE312 10020 bytes
SHA-256: 46199a766d244324caf6ae462c2e5419e8582e772bf6d62e7cb2de094bfd9d83
font_02_sfnt_off0001055a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1055A 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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